1、BRITISH STANDARD BS EN 28738:1992 ISO8738:1986 Plain washers for clevis pins Product grade A The European Standard EN28738:1992 has the status of a British Standard UDC621.882.4BSEN28738:1992 This British Standard, having been prepared under the directionof the General Mechanical Engineering Standar
2、ds Policy Committee, waspublished under the authorityof the Standards Boardand comes into effect on 15October1992 BSI12-1999 The following BSI references relate to the work on this standard: Committee reference GME/9 Draft for comment85/73843 DC ISBN 0 580 21317 X Cooperating organizations The Europ
3、ean Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finla
4、nd Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Un
5、ificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Assoc
6、iation suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN28738:1992 BSI 12-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN28738 3 National annex NA (informati
7、ve) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN28738:1992 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the General Mechanical Engineering Standards Policy Committee and is the Engli
8、sh language version of EN28738:1992 Plain washers for clevis pins Product gradeA, published by the European Committee for Standardization (CEN). It is identical with ISO8738:1986 published by the International Organization for Standardization (ISO). EN28738:1992 was produced as a result of internati
9、onal discussions in which the United Kingdom took an active part. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity
10、 from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indica
11、ted in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN28738 July1992 UDC621.882.4:621.882.6 Descriptors: Fasteners, hinge pins, washers, plain washers, specifications, dimensions, designation English version Plain washers for clevis pins Product gra
12、de A (ISO8738:1986) Rondelles plates pour axes darticulation Grade A (ISO8738:1986) Scheiben fr Bolzen Produktklasse A (ISO8738:1986) This European Standard was approved by CEN on1992-07-17. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
13、giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official v
14、ersions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgiu
15、m, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassa
16、rt 36, B-1050 Brussels 1992 Copyright reserved to CEN members Ref. No. EN28738:1992 EEN28738:1992 BSI 12-1999 2 Foreword In1992, CEN Technical Committee CEN/TC185 “Threaded and non threaded mechanical fasteners and accessories” the secretariat of which is held by DIN decided to submit the Internatio
17、nal Standard ISO8738:1986 “Plain washers for clevis pins Product grade A” to the formal vote procedure. The result was positive. In the countries bound to implement this European Standard a national standard identical to this European Standard shall be published at the latest by1993-01-31 and confli
18、cting national standards shall be withdrawn at the latest by1993-01-31. According to the CEN/CENELEC Common Rules the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norw
19、ay, Spain, Portugal, Sweden, Switzerland and UnitedKingdom. Contents Page Foreword 2 1 Scope and field of application 3 2 References 3 3 Dimensions 4 4 Specifications and reference International Standards 5 5 Designation 5EN28738:1992 BSI 12-1999 3 1 Scope and field of application This International
20、 Standard specifies the characteristics of plain washers for clevis pins according to ISO2340 and ISO2341. Plain washers in accordance with this International Standard shall be used on the cotter pin end only. 2 References ISO2081, Metallic coatings Electroplated coatings of zinc on iron or steel. I
21、SO2340, Clevis pins without head. ISO2341, Clevis pins with head. ISO3269, Fasteners Acceptance inspection. ISO4520, Chromate conversion coatings on electroplated zinc and cadmium coatings. ISO4759-3, Tolerances for fasteners Part3: Washers for metric bolts, screws and nuts with thread diameters fro
22、m1 up to and including150mm Product grades A and C. EN28738:1992 4 BSI 12-1999 3 Dimensions Dimensions in millimetres Nominal size d Hole diameter d 1 Outside diameter d 2 Thickness h nom. (min.) max. nom. (max.) min. nom. max. min. 3 4 5 3 4 5 3,14 4,18 5,18 6 8 10 5,70 7,64 9,64 0,8 0,8 1 0,9 0,9
23、1,1 0,7 0,7 0,9 6 8 10 6 8 10 6,18 8,22 10,22 12 15 18 11,57 14,57 17,57 1,6 2 2,5 1,8 2,2 2,7 1,4 1,8 2,3 12 14 16 12 14 16 12,27 14,27 16,27 20 22 24 19,48 21,48 23,48 3 3 3 3,3 3,3 3,3 2,7 2,7 2,7 18 20 22 18 20 22 18,27 20,33 22,33 28 30 34 27,48 29,48 33,38 4 4 4 4,3 4,3 4,3 3,7 3,7 3,7 24 27 3
24、0 24 27 30 24,33 27,52 30,52 37 39 44 36,38 38 43 4 5 5 4,3 5,6 5,6 3,7 4,4 4,4 33 36 40 33 36 40 33,62 36,62 40,62 47 50 56 46 49 54,8 5 6 6 5,6 6,6 6,6 4,4 5,4 5,4 45 50 55 45 50 55 45,62 50,62 55,74 60 66 72 58,8 64,8 70,8 6 8 8 6,6 9 9 5,4 7 7 60 70 80 60 70 80 60,74 70,74 80,74 78 92 98 76,8 90
25、,6 96,6 10 10 12 11 11 13,2 9 9 10,8 90 100 90 100 90,87 100,87 110 120 108,6 118,6 12 12 13,2 13,2 10,8 10,8EN28738:1992 BSI 12-1999 5 4 Specifications and reference International Standards 5 Designation Example for the designation of a plain washer with nominal size8, property class160HV: Washer I
26、SO87388160HV Material St=Steel, hardness160 to250HV (class160HV). Other materials as agreed between customer and supplier. Tolerances Product grade A to ISO4759-3. All tolerances shall apply prior to the application of a plating or coating. Surface finish Plain, i.e.washers to be supplied in natural
27、 finish, treated with a rust-preventative lubricant, unless otherwise specified by agreement between customer and supplier. Preferred coatings are black oxide, phosphate coating or zinc plating with chromate conversion coating (see ISO2081 and ISO4520). Other coatings as agreed between customer and
28、supplier. Workmanship Parts shall be uniform in quality and free of irregularities or detrimental defects. No burrs shall appear on any part of the washer. Acceptability The acceptance procedure is covered in ISO3269.6 blankBSEN28738:1992 BSI 12-1999 National annex NA (informative) Committees respon
29、sible The United Kingdom participation in the preparation of this European Standard was entrusted by the General Mechanical Engineering Standards Policy Committee (GME/-) to Technical Committee GME/9, upon which the following bodies were represented: BEAMA Ltd. British Constructional Steelwork Assoc
30、iation Ltd. British Industrial Fasteners Federation British Railways Board British Steel Industry British Steel Industry (Wire Section) Gauge and Tool Makers Association Ministry of Defence Society of Motor Manufacturers and Traders Ltd. Washer Manufacturers Association of Great Britain The followin
31、g bodies also participated in the preparation of the standard, through subcommittees and panels: Defence Manufacturers Association General Municipal Boilermaker and Allied Trades Union Screw Thread Tool Manufacturers Association Society of British Aerospace Companies Ltd. National annex NB (informat
32、ive) Cross-references Publication referred to Corresponding British Standard ISO2340:1986 BS EN22340:1992 Clevis pins without head ISO2341:1986 BS EN22341:1992 Clevis pins with head ISO4520:1981 BS6338:1982 Specification for chromate conversion coatings on electroplated zinc and cadmium coatings ISO
33、4759-3:1977 BS6322 Tolerances for fasteners Part3:1982 Specification for tolerances of washers for metric bolts, screws and nuts with thread diameters from1mm up to and including150mm. Product grades A and CBS EN 28738:1992 ISO8738:1986 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsIns
34、titution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards sho
35、uld make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committ
36、ee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, in
37、ternational and foreign standards publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as BritishStandards, unless otherwise requ
38、ested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and servic
39、es. Contact the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel:020899
40、67002. Fax:02089967001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retr
41、ieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size, type or grade designati
42、ons. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.
